Mechanical movement.



G. G. BULTMAN.

MECHANICAL MOVEMENT.

APPLIOATION FILED SEPT. 1, 1909.

1,016,545, I Patented Feb. 6,1912.

UNITED STATES PATENT OFFICE.

CYRUS C. BULTMAN, OF CLEVELAND, OHIO.

MECHANICAL MOVEMENT.

To all whom it may concern Be it known that I, CYRUS C. BULTMAN, a citizen of the United States, and a resident of Cleveland, county of Cuyahoga, and State of Ohio, have invented a new and useful Improvement in Mechanical Movements, of which the following is a specification, the principle of the invention being herein explained and the best mode in which I have contemplated applying that principle, so as to distinguish it from other inventions.

My improved mechanical movement is designed for the conversion of continuous rotary movement into intermittent rotary movement, the object of the improvements being to provide a device of this kind wherein such conversion may be effected with a minimum of jar and shock, while the movement itself will be positive and the parts securely locked against tremor or vibration between successive intermittent movements of the driven member.

One specific field of use for the device is found in connection with moving picture machines, wherein, as is well understood, an elongated film requires to be given an intermittent progressive movement. Such movement in practice is imparted by unrolling the film from one roller on to another, each successive picture on a film being permitted to momentarily rest in line with the projecting apparatus. Obviously during such period of rest, the film must not be disturbed in the slightest, and when moved, the movement should be quick andsharp.

To the accomplishment of the foregoing objects, the invention, then, consists of the means hereinafter fully described and particularly pointed out in the claims.

The annexed drawing and the following description set forth in detail certain mechanism embodying the invention, such disclosed means constituting, however, but one of the various mechanical forms in which the principle of the invention may be used.

In said annexed drawing :Figure 1 is a plan view of one approved construction embodying my present improvements; Fig. 2 is a side elevational view of the same; Fig. 3 is a section through a portion of the device on the line 33, Fig. 1; Fig. 4c is a plan view corresponding to Fig. 1 but show- Specification of Letters Patent.

Application filed. September 1, 1909.

PatentedFeb. 6, 1912.

Serial No. 515,564.

ing a modified form of construction; while Fig. 5 is a side view of such modified form.

The characteristic features of the device are the driving and driven members, which consist of two disks disposed with their axes in angular relation, the angle being preferably a right angle. The disk A constituting the driving member, is of course, designed to be continuously rotated, and it is the other disk B, or rather the shaft I) bearing the same, to which it is desired that intermittent rotative movement be imparted.

Referring first of all to the form of construction illustrated in Figs. 1 to 3 inclusive, the driving disk is there designed to impart two successive intermittent movements per revolution, each such intermittent movement being through one-sixth of an entire rotation of the driven member. Upon the periphery of the disk mounted on the driven shaft Z), I accordingly, mount six radially disposed pins 6 preferably bearing rollers b for the purpose of reducing friction, which pins, or rollers as the case may be, are adapted respectively to bear against the upper face a of the first or continuously rotating disk and a portion a of the peripheral edge of the same, such face and edge being at an angle with respect to each other that corresponds with the angular divergence of adjacent radial pins of the second member. Intermediate of the face a and the edge portion a that thus bear "against the pins, said continuously i'otating disk is formed with an edge portion a conforming to the peripheral surface of the intermittently rotating disk lying between the two pins thus engaging with said face and edge. With the parts in the position illustrated in Figs. 1 and 3, accordingly, disk B is held locked against rotation, as will be obvious, and in order to take up any looseness in the parts or wear on the pins or engaging surfaces of the disks, the upper face of the disk A is provided with a resiliently supported plate (4 adapted to contact with the correspondingly disposed radial pin, thus maintaining the parts in snug running condition at all times.

The rotative movement which it is the object of the device to impart to the disk B and shaft 2), is secured by providing one or more (in the present case two) helical grooves a crossing the periphery of the con tinuously rotating disk A from its upper to its under side. Such groove is then disposed to engage the roller 6 that bears against the upper face of the disk, and to insure such engagement a tongue-like extension a is provided projecting above such face.

From the foregoing description, the mode of operation of the device should be readily apparent, for every time one of the helical grooves is encountered by a roller on the upper face of the continuously rotating disk, such roller will be transferred from above to below such disk, by a quick movement, the speed of which can be accurately gaged by the conformation of the groove, both as to time consumed in the movement, and as to the rate of the movement during different portions thereof. In other words, the movement may be started and stopped slowly, but made very rapid intermediate of the starting and stopping points.

The construction of Figs. l and 5 illustratcs a simple form of the invention, in that but four pins 6 are provided on the driven member, and but a single engaging groove a on the driving member. [is a result it requires four revolutions of the latter to produce one complete revolution of the former, such revolution being accomplished by four intermittent movements through an angle of 90 degrees each. The general arrangement of parts is otherwise the same as in the first described device, except that the resilient means whereby wear and looseness of parts is taken up, is in the form of a coil spring (4 extending around the lateral edges of the disk instead of a spring supported plate on the upper face. Such spring a, it will accordingly be seen, bears against the lower of the two pins engaging with the driving member instead of with the upper.

It will be obvious that if desired, the angle of inclination between the axes of the respective disks, or rather of the shafts bearing the same, may be other than a right angle, the conformation of the contacting edges of the disks being varied to suit. The manner in which the frequency and extent of the intermittent movement imparted to the driven member may be varied, is sufficiently indicated by the two forms of construction shown in the drawings and just described. In any of its various forms, the invention provides a device admirably suited, not only for the particular serviceto which reference has been previously made, but for use in any situation where it is required that the driven member be held against vibration when not moving, and that such movement be imparted quickly and at a rate of speed under accurate control.

Other modes of applying the principle of my invention may be employed instead of the one explained, change being made as regards the mechanism herein disclosed, provided the means stated by any of the following claims or the equivalent of such stated means be employed.

I therefore particularly point outand distinctly claim as my invention l. A device of the character described, comprising a rotatable driven member pro vided. with radial projections, a rotatable driving member in peripheral contact with the driven member, the axes of said members being in angular relation to each other, the periphery of the driving member including three relatively angularly disposed surfaces, the two extreme surfaces being respectively adapted to contact with two adjacent projections, and the intermediate surface being of concave form, and said driving member having a groove connecting said two ex treme surfaces and adapted on rotation of said member to engage one of said projections and thereby impart a rotative movement to the driven member.

2. A device of the character described, comprising a rotatable driven member provided with radial projections, a rotatable driving member in peripheral contact with the driven member, the axes of said members being in angular relation to each other, the periphery of the driving member including three relatively angularly disposed surfaces, the two extreme surfaces being respectively adapted to contact with two adjacent projections, and the intermediate surface being of concave form, and said driving member having a groove connecting said two extreme surfaces and adapted on rotation of said member to engage one of said projections and thereby impart a rotative movement to the driven member, the driving member be ing also provided with a tongue-like extension associated with said groove and adapted to assist in engaging said projections.

3. A device of the character described, comprising a rotatable driven disk provided with radial projections, and a rotatable driving disk in peripheral contact with the driven disk, the axes of said disks being in angular relation to each other, the periphery of the driving disk comprising three relatively angularly disposed surfaces, the upper and lower peripheral surfaces being respectively adapted to contact with each of two adjacent projections, and the intermediate surface corresponding in its conformation with the periphery of the driven disk, said driving disk having a groove across its edge adapted, on rotation of said disk, to engage one of said projections and thereby impart a rotative move ment to the driven disk.

l. A device of the character described, comprising a rotatable driven disk provided with radial projections, and a rotatable driving disk in peripheral contact with the driven disk, the axes of said disks being in angular relation to each other, the periphery of the driving disk comprising three relatively angularly disposed surfaces, the upper and lower peripheral surface being adapted to contact with each of two adjacent projections, and the intermediate surface corresponding in its conformation with the periphery of the driven disk, said driving disk having a groove of helical form across its edge adapted, on rotation of said disk, to engage one of said projections and thereby impart a rotative movement to the driven disk, the driving disk being provided with a tongue-like extension associated with said groove and adapted to assist in engaging said projection.

5. A device of the character described, comprising a rotatable driven member provided with projections, a rotatable driving member being adapted to engage the projections on said driven member and to periodically imparta rotative movement to the latter, and resilient means on said driving member cooperating with such projections to prevent vibration.

6. A device of the character described, comprising a rotatable driven member provided with projections, a rotatable driving member with its axis in angular relation to that of said driven member, said driving member being adapted to engage the projections on said driven member and to periodically impart a rotative movement to the latter, and resilient means on said driving member cooperating with such projections to prevent vibration.

7. A device of the character described, comprising a rotatable driven disk provided with radial projections, a rotatable driving disk with its axis in angular relation to that of said driven disk, and resilient means on the driving disk cooperating with said projections to prevent vibration, the driving disk having a groove across its edge adapted, on rotation of said disk, to engage one of said projections and thereby impart a rotative movement to said driven disk.

8. A device of the character described, comprising a rotatable driven disk provided With radial projections, a rotatable driving disk with its axis in angular relation to that of said driven disk, and resilient means on the driving disk cooperating with said projections to prevent vibration, the driving disk having a groove of helical form across its edge adapted, on rotation of said disk, to engage one of said projections and thereby impart a rotative movement to the driven disk.

9. A device of the character described, comprising a rotatable driven disk provided with radial projections, a rotatable driving disk with its axis in angular relation to that of said driven disk, and resilient means on the driving disk cooperating with said projections to prevent vibration, said driving disk having a groove across its edge adapted, on rotation of the disk, to engage one of said projections and thereby impart a rotative movement to the driven disk, the driving disk being provided with a tonguelike extension associated with said groove and adapted to assist in engaging said projection.

Signed by me this 26th day of August, 1909.

CYRUS O. BULTMAN. Attested by ANNA L. GJLL, JNo. F. OBERLIN.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents Washington, D. C. 

